How to: Set “Password Never Expires” on Office 365 accounts.

However, using Office 365 with external applications isn’t great when it comes to dealing with password resets. In many cases, the first thing a user knows is that their email no longer connects, as the countdown warnings on a regular domain account don’t necessarily apply.

With this in mind, it may be beneficial to set users’ Office 365 accounts to have their passwords never expire automatically. In this way, you can give people fair warning of when they’ll need to change their passwords and let them know what they need to do.